Extend Graphql query for environment's essentials

What does this MR do and why?

This MR extends GraphQL query for fetching environment information. Specifically, adding the persisted columns in environments table to the EnvironmentType.

Related #371952 (closed)

Query example

{
  project(fullPath: "dosuken-org/deployment-approval-test") {
    environments {
      nodes {
        createdAt
        updatedAt
        autoStopAt
        autoDeleteAt
        slug
        tier
        environmentType
      }
    }
  }
}

Response

{
  "data": {
    "project": {
      "environments": {
        "nodes": [
          {
            "createdAt": "2022-09-06T04:31:52Z",
            "updatedAt": "2022-09-06T04:31:52Z",
            "autoStopAt": null,
            "autoDeleteAt": null,
            "slug": "production",
            "tier": "PRODUCTION",
            "environmentType": null
          }
        ]
      }
    }
  }
}

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.